TOKYO: Oil prices were largely flat on Wednesday after rising about $1 at the start of Asian trading, with investors assessing the outlook for U.S.-Iran peace talks following the U.S. extension of a ceasefire.

Brent crude futures were up 3 cents, or 0.02%, at $98.51 a barrel at 0438 GMT, after touching $99.38 per barrel earlier in the session. West Texas Intermediate futures were down 13 cents, or 0.14%, to $89.53 after climbing as high as $90.71 at the open.